为什么std::array在这里以不同方式实例化数据类型
using T = const int *;
std::array<T, 4> x = { &a, &b, &c, &d }; // name: class std::array<int const *,4>
x[0] = &c; // OK : non-constant pointer
*x[0] = c; // Error : constant data
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相比这里?
using T = int *;
std::array<const T, 4> x = { &a, &b, &c, &d }; // name: class std::array<int * const,4>
x[0] = &c; // Error : constant pointer
*x[0] = c; // OK : non-constant data …Run Code Online (Sandbox Code Playgroud)